I have to ask why? I always found the brakes on my c6 plenty good enough.
if you’re finding they’re weak, I’d first look to see if there is a cause of this. Before I spent the time and money on s6 brakes I’d try braided lines first.
someone else may be able to confirm but I think s6 discs are...
I did enable it on mine(passenger) but it didn’t work all the time. Most of the time, even though I’d set the positions it wouldn’t return to the correct position. Not sure if it’s possible to do the drivers as well
How does the car ride? If it feels very bouncy then the dampers are shot. They control how quickly the spring compresses (compression) and returns to its position (rebound). Springs and dampers work together, not independently of each other.
If there are engine issues they can be expensive to repair.
Spares or repair says to me just that. If it wasn’t they’d be selling it as a runner with no warranty or sending it to auction/eBay.
handy with spanners and have the time/another vehicle to use, worth a punt. If not, avoid. Could be...